Sion Weather in December

December in Sion sees daytime temperatures around -3°C (27°F) and lows of -12°C (10°F) at night. With around 139 mm (5.5 in) of snowfall expected, it's worth packing a rain jacket.

Rainfall in Sion in December

Expect around 14 days of snow based on historical data, with 139 mm (5.5 in) average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Sion in December

In December, Sion gets very low temperatures, with highs of -3°C (27°F). Nights cool to around -12°C (10°F). December is part of winter. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. At -12°C (10°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. This month is extremely cold, so be sure to dress in layers to keep warm. Proper preparation can help you stay comfortable.

Sunshine in Sion in December

The area experiences limited sunny days, amounting to roughly 70 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.

Wind Speed in Sion in December

December has wind speeds averaging 1 m/s (2 knots). You can expect very gentle conditions with light air movement on typical days. Since this is an average, daily weather varies from perfectly still moments to some breezier days.

December in Sion can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.